Polarized electromagnet



Hi-GSAAL I POLARIZED ELECTROMAGNET Filed March 20,, 1925 @mii -Emy 8symmetrically relcteii pairs of i.

Pntentcci Felt. 13, $1926.,

UNHED STAKES PATENT-@FFICE.

with OE GHICAfii), ILEQEINQIS.

implication mm to, 321%.? Kc. 321 382.

To ail whom it may concem:

Be it known that I, Qfizam citizen of the United States, icsifiing attime Etete new Chicago, inthe county of Qooi: e.-

franged to define e qneriieteml Winding space in which the winciing anditscgiooi are disposed." The cpooi for the "indi nges preferably moldedin one piece from. beizciite or other suitable mokiing material. Thespool preferably comprises e portion and two flanges, one at each end ofthe iomiy portion, said flanges heading each, two eheoei shoulders onby; ositc siciee of the cocci 'iiiae shouiciers. 0. each cit aresymmetri cell; rotated endinwer iy facing to define spaces in which saidpolioi'exten'sions are received.

The invention will be more fully e31 lnincd in connection with theaccompanying drawing in which Fig. 1 is an axial. sectional View of atelephone receiver con taining the preferred form of polarized 'megnetof my invention; Fig. 2 is a sectionai view on line 2-2 or Fig. i; Fig.3'

it view in side elevation of the structure 40 "illustrated in Fi s. 1, 2and 3 but with the receive: casing removed; and Fig. 4': is aperspective View illustrating the spool and one polar extension inassembly and the other polar extension separated,

Like ports are indicated by similar characters of reference throughoutthe difi'ei'ent figures.

The permanent magnet 1 is pi'efcmbiv ring like in form.

Its pole; extensions 2 I are of ii form, each end. of the permanentmagnet be ng provided with one of-thcse extensions which aresymmetrically er- --i"-m 'ed with one ends of each facing and O n)Spaced apart from the ends of the other to define n space tor the magnetwinding it agnet. The

e anti the cmietuce i the icet Electra- A. i'ivet passes through bogiyof winding eoooi comprises a bociy portion 5 cnci two flanges 6 one ateach end of the booiy portion, said flanges having, each, twoevnmieti'icoiiy neieted pairs or L shaped s outdo-rs I on opposite sidesof the spool. The shouiciere oft cacii air are symmetricelly reiotedonclinwai'c 1y facing to definespcces in which said polar extensions arereceived. The spool is formed with an opening 8 extending theretiiroughand between the L shaped shoulders of each pair, the

polar extensions are formed with angular recesses 9 at each of itscorners in which adjacent sides of the shoulders are received. The coil3 is wound u n saici spool between its flanges. T c armature 4' ismounted upon a stirrup 10 and is pieced. within the spooi o ening andbetween said polar extensions. "he spooi, which, witifits fian ee; ispreferably made of mohied bakelite, is time fimniy oesemble with and soL 3 I 4 i I pom/co o3; the potato extensions witnout t 1c cid ot'miditionai means.

The iuociyportion 11 oi the traieiver casing isexterioriy tizieoded atsite rim to receive the casing cap 12 that is screwed thereon lice :1control sound conveying paseegc 13 here shown as being interioriythreaded for connection with a, sound omplifying horn. A ligifi cup 1%has its circular cot-setting rim 15 clamped between the threaded end; ofthe casing body and en cnnulcr ridge 15 formed upon the intefior of thecap 12. The tele hone receiver die phlegm other suitable resiiient sheetmaterial, is interimsed and eiampeci between the ridge am the annularrim oi the cup, this rim constituting a seat for the diaphragm. As isset forth in cepenciing application, the

diaphragm is tensioned to resist deflection from its normal plane ineither direction, a. central portion of the diaphragm and has flanges19411161 20,

one upon each side ofthe diaphragm. The, flange 19 is secured in pleneby stcking. Cushion Washers 21 end 22 are employed, one being clampedbetween each rivet flange zinii the adjacent face of the diaphragm. Alink 23 is screwed, at one end,into soici FiVBiZ and is furtherSvflil'ii thereto by a drop of soldier 24lupon the outer ends of thelink and rivet. This link is connected at its other end in one end ofthe armature composeci oi mice, bokeiite, or

integrally 1 :formed wwith the i the rivet and the fiange 20 is,

prising a body portion assembly of the diaphragm and :irn'iet e do ihedform the subject matter or" my copending application Serial No. 231295)filed hilly l, 1925.

It is obvious that changes may be made without departing from the spiritof my invention.

Having thus described my invention I claim as new and desire to secureby Letters Patent the iollowingz-- l. in a polarized electromagnet, thecombination willi permanent magnet; oi two polar extensions of U form,each end of the permanent magnet being provided with one of theseextensions which are symmetrically arranged with the ends of each facingand spaced apart from the ends of the other to define a space for thewinding}; and armature of the magnet; a winding spool comprising a hodyportion and two flanges, one at each end of the body portion. soidflanges having, eacln two symmetrically related pairs of L shapedshoulders on opposite sides of the spool, the shoulders of each pairbeing; symmetrically related and in weirdly facing in define spaces inwhich seid polar exliensions received, the spool heing formed withopening extending therct-hi'on and between the l. shaped shoulders Leach. pom, the polar extensions bein formed with ain 'ulei recesses ateachof their corners ingwhich adjacent sides of the shoulders arereceived; a winding upon said spool and between its flanges; and onarmature within the'spool opening and hetween said polar extensions.

2. In polarized electromegnet, the combination wit-ll a, permanentmagnet; of two polar extensions'of U form, each end of the permanentmagnet being provided with one of these extensions which aresymmetrically arrnnged will the ends oil-each facing and spaced apartfrom the ends of the other to define a space for the winding and ammo.

ture of the magnet; a winding spool comand two flanges, one at each endof the body portion, said flanges having, each, two symmetricallyrelated pairs of L'shaped shoulders on opposite sides of the spool, theshoulders of each pair being symmetrically relaied and inwardly facingto define spaces in which said polar extensions are received, the spoolbeing formed with an opening extending therethrongh, the polarextensions being foimc-d'with angular recesses at each of their cornersin which adjacent sides of the shoulders are received; a, winding uponsaid spool and between its flanges; and an armature within the spoolopening and between said polar extensions.

3. 1n a polarized elecp'omagnct, the combinetion with 21 permanentmagnet; of two polar extensions of U form, eachend of the permanentmagnet being provided with i-icolly arranged Withthe ends of emons oneof these extensions which are symmetrically nzii'anged with theonds ofeach fecing and spaced apart from. the ends of the other to define a.space for the winding and armature of the magnet; a winding spool madeof molded material comprising abody portion and two flanges, one. ateach end of the body portion, said flanges having, each, twosymmetrically related pairs of L shaped shoulders on opposite sides ofthe spool, the shoulders 01' each pair being symmetrically related andinwardly facing to define spaces in which said polar extensions arereceived, the spool being; formed with an opening extending therethroughand between the L shaped shoulders of each pair, the polar extensionsbeing formed with angular recesses at each oi" their corners in whichadjacent sides of the shoulders are received, a winding upon said spooland between. its flanges; and an nrziiiitiu'o within the spool openingand between said polar extensions.

4- lna polarized electronmgnet, the combination with a pernmnentmagnet;of two pols extensions of U form, each end of the permanent magnet beingprovided with one oi these extensions which are symmetrically arrangedwith the ends oi' each facing and spaced apart from, the ends of theother to define a space for the winding and armature of the n'iagnet; awinding spool made of molded material comprising a body portion and twoflanges; one at each end pf the body portion, said flanges having, each,two symmetrically related pairs o i L shaped shoulders on opposite sidesof the spool, the shouldci s of each pair being syni' metrically relatedand inwardly facing to define spaces in which said polar extensions arereceived, the spool being formed with an opening extending therethrough,the polar extentions being formed with angular recesses at each of theircorners in which adjacent sides of the shoulders are received; a Windingupon said spool and between. its flanges; and an armature within thespool opening and between said polar extensions.

5. In a polarized clectromagnet, the combination with a permanentmagnet; of two polar extensions of U form, each end of the permanentmagnet being provided with one of these extensions which are symmeteachfacing and spaced apart from the ends of the other to define a space forthe winding and armature of the magnet; a Winding spool comprising abody portion and two, flanges, one at each end of the body por tion,said flanges having, each, two symmetrically related pairs of L shapedshoulders on opposide sides of the spool, the shoulders of each pairbeing symmetrically related and inwardly facing to define spaces inwhich said polar extensions are received, the spool beiiig fox-mailWiiili as opening extending tlieielslirougli and belnveeii 'i'lie l.shaped SilOLllCiEiS of each pair; winding upon said spool andbEi-Wfifil'l its flanges; and an armeture within file spool opening andbetween said poise extensions.

6. In a polarized electromagoet the combination with a. permanentmagnetyof two poles extensions of U for: 1, each end of the permanentmags-ct being provided with one of these extensions which aresymmetrically armngeflwill]. the emls of each facing and spsc'ecl apartfrom the ends of the other ":0 defined space for the wincling and.armall\1i of the mugneo; 2, wincling spool com- ,prising a body portionand two flanges, one

ill? each end of H18 hotly porlz-ion, said flanges having, each, im'osymmetrically related pairs of l shaped should rs on ogposite sicles ofthe spool, the shoulders of each psir' being symmetrically related andinwardly'lecing to define spaces in which we poles extensions arereceived, the spool rising iormeii with an opening extendingtliere'sliro'ugli; e Winding upon said and between its flanges; 21ml anarnmtuie within the spool opening encl between said polar extensions.

'7. In a polarized clectromzignet, the comloinaiiori with e pexcmenenl;magnet; of two polar extensions of U form, each end of the permanentmagnetlaeing provided with one of these extensions which aresymn'icti'icslly ELIlElYlg8(i with the ends of each facing and spacedsome from the ends of the other to decline a space for winding andnrnieiluie of lhe magnets winding spool made of molded z'izsterizilcomprising a bocly portion and two flanges, one at e'icli end of thebody portion, said flanges llilllflg} each two symmetrically relaiisrlpairs of 5.. shag-cal shoulders on opposi'l'e sides of the spool,

permanent magnet beinp' provided with one of these extensions which aresynin'ietrically zu'rangeol with the ends of each facing and spacedapart from the ends of the oilioi to define a space for the winding andarms lure of the magnet; a winding spool made of molded materialcomprising a body por- (ion and two flanges; one at each encl of thebody portion,- said flanges having, each two symmetrically related pairsof la shaped shoulders on opposite sicles of the spool, the slioulziersof each pair lieing syimneti'i sally related and inwardly facing todefine spaces in which said polar extensions are received, the spoolbeing formed with an opening extending theretlirough; a inding upon saidspool and between its lioness;

and an armature within-the spool opening and between said polarextensions.

lln witness whereof, I hereunto subscribe meme.

HENRY G. SALL.

